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Neutrons on Classically Inexplicable Paths
Is nature really as strange as quantum theory says - or are there simpler explanations? Neutron measurements at TU Wien prove: It doesn't work without the strange properties of quantum theory.
In 1985, physicists Anthony James Leggett and Anupam Garg published a formula with which macroscopic realism can be tested: The Leggett-Garg Inequality. "The idea behind it is similar to the more famous Bell's inequality, for which the Nobel Prize in Physics was awarded in 2022," says Elisabeth Kreuzgruber, first author of the paper. However, if the object adheres to the rules of quantum theory, then there must be significantly stronger statistical correlations between the measurement results at the three different points in time.
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